Toyota 4Runner manuals

Toyota 4Runner: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • The ECM is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP


NEXT

2.

CUSTOMER PROBLEM ANALYSIS

(a) Refer to How to Troubleshoot ECU Controlled Systems in the Introduction section (See page ).



NEXT

3.

INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding.


NEXT

4.

CONNECT TECHSTREAM TO DLC3*


NEXT

5.

CHECK AND CLEAR DTCS AND FREEZE FRAME DATA*

(a) Refer to DTC Check / Clear (See page )



NEXT

6.

VISUAL INSPECTION


NEXT

7.

SETTING CHECK MODE DIAGNOSIS*

(a) Refer to Check Mode Procedure (Click here
).


NEXT

8.

PROBLEM SYMPTOM CONFIRMATION

(a) Refer to Road Test (See page ).


Result

Proceed to

Symptom does not occur

A

Symptom occurs

B


B

GO TO STEP 10


A

9.

SYMPTOM SIMULATION

(a) Refer to Electronic Circuit Inspection Procedure (See page ).



NEXT

10.

DTC CHECK*

(a) Refer to DTC Check / Clear (See page ).


Result

Proceed to

DTC is not output

A

DTC is output

B


B

GO TO STEP 19


A

11.

BASIC INSPECTION

(a) Refer to Automatic Transmission Fluid (See page ).


(b) Refer to Park/Neutral Position Switch (See page ).


(c) Refer to Shift Lever Assembly (See page
).


NG

GO TO STEP 22


OK

12.

MECHANICAL SYSTEM TESTS

(a) Refer to Mechanical System Tests (See page ).



NG

GO TO STEP 18


OK

13.

HYDRAULIC TEST

(a) Refer to Hydraulic Test (See page ).



NG

GO TO STEP 18


OK

14.

MANUAL SHIFTING TEST

(a) Refer to Manual Shifting Test (See page
).


NG

GO TO STEP 17


OK

15.

PROBLEM SYMPTOMS TABLE CHAPTER 1

(a) Refer to Problem Symptoms Table (See page
).


NG

GO TO STEP 20


OK

16.

PROBLEM SYMPTOMS TABLE CHAPTER 2

(a) Refer to Problem Symptoms Table (See page
).


NG

GO TO STEP 18


OK

17.

PROBLEM SYMPTOMS TABLE CHAPTER 3

(a) Refer to Problem Symptoms Table (See page
).


NEXT

18.

PART INSPECTION


NG

GO TO STEP 22


OK

19.

DTC CHART

(a) Refer to Diagnostic Trouble Code Chart (See page ).



NEXT

20.

CIRCUIT INSPECTION


NEXT

21.

IDENTIFICATION OF PROBLEM


NEXT

22.

REPAIR OR REPLACE


NEXT

23.

CONFIRMATION TEST


NEXT

END

System Description
SYSTEM DESCRIPTION 1. SYSTEM DESCRIPTION (a) The Electronic Controlled Automatic Transmission (ECT) is an automatic transmission that electronically controls shift timing using the Engine Control ...

Road Test
ROAD TEST 1. PROBLEM SYMPTOM CONFIRMATION (a) Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem is that the transmission does not shift up or shif ...

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